package com.example.tests;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import com.thoughtworks.xstream.XStream;

public class ContactDataGenerator {

	public static void main(String[] args) throws IOException {
		if(args.length < 3){
		   System.out.println("Please specify parameters: <amount of test data> <file> <format>");
		   return;
		}
      
		int amount = Integer.parseInt(args[0]);
		File file = new File(args[1]);
		String format = args[2];
		
		if(file.exists()) {
			 System.out.println("File exists, please remove manually: " + file);
			   return;
		}		
		
		List<ContactData> contacts = generateRandomContacts(amount);
		if("csv".equals(format)) {
			saveContactsToCsvFile(contacts, file);
		} else if("xml".equals(format)) {
			saveContactsToXmlFile(contacts, file);
		} else {
			System.out.println("Unknown format" + format);
			return;
		}
		
	}

	private static void saveContactsToXmlFile(List<ContactData> contacts, File file) throws IOException {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		String xml = xstream.toXML(contacts);
		FileWriter writer = new FileWriter(file);
		writer.write(xml);
		writer.close();
	}
	
	public static List<ContactData> loadContactsFromXmlFile(File file) {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		return (List<ContactData>) xstream.fromXML(file);
	}

	private static void saveContactsToCsvFile(List<ContactData> contacts, File file) throws IOException {
		FileWriter writer = new FileWriter(file);
		for (ContactData contact : contacts) {
			writer.write(contact.getFirstname() + "," + contact.getLastname() + "," + contact.getAddress_one() + "," + 
		contact.getPhonehome() + "," + contact.getPhonemobile() + "," + contact.getWork() + "," + contact.getMail_one() + "," 
		+ contact.getMail_two() + "," + contact.getBirthDay() + "," + contact.getBirthMonth() + "," + contact.getBirthYear() + "," 
		+ contact.getAddress_two() + "," + contact.getHome_two() + ",!" +"\n");
		}
		writer.close();
	}
	
	public static List<ContactData> loadContactsFromCsvFile(File file) throws IOException {
		List<ContactData> list = new ArrayList<ContactData>();
		FileReader reader = new FileReader(file);
		BufferedReader bufferedReader = new BufferedReader(reader);
		String line = bufferedReader.readLine();
		while (line != null) {
			String[] part = line.split(",");
			ContactData contact = new ContactData()
			.withFirstname(part[0])
			.withLastname(part[1])
			.withAddressOne(part[2])
			.withPhonehome(part[3])
			.withPhonemobile(part[4])
			.withWork(part[5])
			.withMailOne(part[6])
			.withMailTwo(part[7])
			//.birthDay(birthDay)
			//.birthMonth(birthMonth)
			//.birthYear(birthYear)
			.withAddressTwo(part[8])
			.withHomeTwo(part[9]);
			list.add(contact);
			line = bufferedReader.readLine();
		}
		bufferedReader.close();
		return list;
	}

	public static List<ContactData> generateRandomContacts(int amount) {
		List<ContactData> list = new ArrayList<ContactData>();
		for(int i = 0; i < amount; i ++){
			ContactData contact = new ContactData()
			.withFirstname(generateRandomString1())
			.withLastname(generateRandomString1())
			.withAddressOne(generateRandomString1())
			.withPhonehome(generateRandomString1())
			.withPhonemobile(generateRandomString1())
			.withWork(generateRandomString1())
			.withMailOne(generateRandomString1())
			.withMailTwo(generateRandomString1())
			.withAddressTwo(generateRandomString1())
			.withHomeTwo(generateRandomString1());
		  
			contact.birthDay = "1";
			contact.birthMonth = "January";
			contact.birthYear = "1970";
			
			list.add(contact);
		}
		return list;
	}
	
	public static String generateRandomString1(){
		Random rnd = new Random();
		if (rnd.nextInt(3) == 0){
			return "";
		} else{
			return "test" + rnd.nextInt();
		}
	}

}
